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Proceedings Paper

Hard x-ray delay line for x-ray photon correlation spectroscopy and jitter-free pump-probe experiments at LCLS
Author(s): Wojciech Roseker; Sooheyong Lee; Michael Walther; Horst Schulte-Schrepping; Hermann Franz; Amber Gray; Marcin Sikorski; Paul H. Fuoss; G. Brian Stephenson; Aymeric Robert; Gerhard Grübel
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Paper Abstract

A hard X-ray delay line device capable of splitting single FEL X-ray pulses into two adjustable fractions and recombining them with the goal of performing X-ray Photon Correlation Spectroscopy and pump - probe type studies was designed. The performance of the device has been verified at the XPP and XCS instruments of LCLS. The measured throughput of the device at 7.9 keV is 3.6%. The coherence properties of the LCLS beam passing through the delay line were investigated by analyzing speckle patterns produced by single LCLS pulses. A high speckle contrast of 0.69 was found, indicating the feasibility of performing coherence based experiments with the delay line.

Paper Details

Date Published: 17 October 2012
PDF: 7 pages
Proc. SPIE 8504, X-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications, 85040I (17 October 2012); doi: 10.1117/12.929759
Show Author Affiliations
Wojciech Roseker, Deutsches Elektronen-Synchrotron (Germany)
Sooheyong Lee, Korea Research Institute of Standards and Science (Korea, Republic of)
Michael Walther, Deutsches Elektronen-Synchrotron (Germany)
Horst Schulte-Schrepping, Deutsches Elektronen-Synchrotron (Germany)
Hermann Franz, Deutsches Elektronen-Synchrotron (Germany)
Amber Gray, SLAC National Accelerator Lab. (United States)
Marcin Sikorski, SLAC National Accelerator Lab. (United States)
Paul H. Fuoss, Materials Science Division, Argonne National Lab. (United States)
G. Brian Stephenson, Materials Science Division, Argonne National Lab. (United States)
Advanced Photon Source, Argonne National Lab (United States)
Aymeric Robert, SLAC National Accelerator Lab. (United States)
Gerhard Grübel, Deutsches Elektronen-Synchrotron (Germany)


Published in SPIE Proceedings Vol. 8504:
X-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications
Stefan P. Moeller; Makina Yabashi; Stefan P. Hau-Riege, Editor(s)

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